BQ27XXX_RS
charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
curr = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;